Genius slipper design where you knit a short "scarf", fold and sew onto your bottom. Garter stitch extra chunky yarn about wide, and however many rows you need, then sew into the 2 layers of the felt bottom.
Scrap bag Knitted with long fabric strips ( scraps from the local quilting group). "Sew wot" knitted 3 pieces separately then stitched them together to get the width. The bag is lined with acrylic felt to help with substance.